Year	scale 1-100
1970	55
1971	55
1972	55
1973	57.5
1974	57.5
1975	57.5
1976	57.5
1977	57.5
1978	57.5
1979	57.5
1980	57.5
1981	57.5
1982	57.5
1983	57.5
1984	57.5
1985	57.5
1986	57.5
1987	57.5
1988	57.5
1989	57.5
1990	60
1991	60
1992	60
1993	60
1994	60
1995	63.125
1996	65.625
1997	65.625
1998	65.625
1999	65.625
2000	65.625
2001	65.625
2002	65.625
2003	65.625
2004	68.125
2005	68.125
2006	68.125
2007	68.125
2008	68.125
2009	68.125
2010	68.125
2011	68.125
2012	68.125
2013	68.125
2014	68.125
2015	68.125
2016	68.125
2017	68.125
2018	68.125
2019	68.125
2020	68.125
2021	68.125
2022	68.125
2023	68.125